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How to use the convert function in SQL to query the date. In view of this problem, this article introduces the corresponding analysis and solution in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

Once encountered such a situation, there is a PublishTime (DateTime,8) field in the Meeting table of the database, which is used to store a meeting time. When it is saved, the format is yyyy-mm-ddhh:mm:ss because it needs to specify the specific time of the meeting, while we query through yyyy-mm-dd, that is, to query all the meeting information for a certain day. In this way, if we query through the select*fromMeetingwherePublishTime=@PublishTime (parameter @ PublishTime is in yyyy-mm-dd format) statement, we will not be able to get the correct results. For example, if we want to query the meeting information on December 1, 2004, we cannot get the query results when we enter 2004-12-01:00, and this kind of query cannot require the input of a specific hh:mm:ss. At this point, we need to use the convert function, which converts an expression of one data type into another. Here, we first convert the datetime type in the database to the char type. Because the input parameters are 10 bits, it is written as select*fromMeetingwhereconvert (varchar (10), PublishTime,121) = @ PublishTime. In this way, when the database gets the parameters, it automatically converts the information in the database into 10-bit characters in yyyy-mm-dd format, and the query results can be returned as long as they are the same as the parameters. 121in convert refers to a 4-digit year including century digits when converting a datetime type to a char type.

This is the answer to the question about how to use the convert function to query the date in SQL. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.

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